Hair dyes contain a group of alcohols which are colorless, non-toxic and chemically indifferent to the dye and the hair. 染发剂中含有一组无色无毒的醇类物质，它们对染料和头发的化学反应是惰性的。
The reactions are selectively compatible with such diverse slurry additives as alcohols, glycols, glycerol, urea, formamide. 与醇类，二醇类，丙三醇，尿素，甲酰胺各种浆液附加物进行反应时，在相言性方面是有选择性的。
